Add a snapshot of flutter/engine/src/build to our sdk

build/json_schema_bundle_registration_compile.gypi

Index: build/json_schema_bundle_registration_compile.gypi
diff --git a/build/json_schema_bundle_registration_compile.gypi b/build/json_schema_bundle_registration_compile.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..8c5af4e8a029c9f4bbda95c36f7d28c965cca015
--- /dev/null
+++ b/build/json_schema_bundle_registration_compile.gypi
@@ -0,0 +1,78 @@
+# Copyright 2014 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+{
+  'variables': {
+    # When including this gypi, the following variables must be set:
+    #   schema_files:
+    #     An array of json or idl files that comprise the api model.
+    #   impl_dir_:
+    #     The root path of API implementations; also used for the
+    #     output location. (N.B. Named as such to prevent gyp from
+    #     expanding it as a relative path.)
+    #   root_namespace:
+    #     A Python string substituion pattern used to generate the C++
+    #     namespace for each API. Use %(namespace)s to replace with the API
+    #     namespace, like "toplevel::%(namespace)s_api".
+    #
+    # Functions and namespaces can be excluded by setting "nocompile" to true.
+    'api_gen_dir': '<(DEPTH)/tools/json_schema_compiler',
+    'api_gen': '<(api_gen_dir)/compiler.py',
+    'generator_files': [
+      '<(api_gen_dir)/cc_generator.py',
+      '<(api_gen_dir)/code.py',
+      '<(api_gen_dir)/compiler.py',
+      '<(api_gen_dir)/cpp_bundle_generator.py',
+      '<(api_gen_dir)/cpp_type_generator.py',
+      '<(api_gen_dir)/cpp_util.py',
+      '<(api_gen_dir)/h_generator.py',
+      '<(api_gen_dir)/idl_schema.py',
+      '<(api_gen_dir)/json_schema.py',
+      '<(api_gen_dir)/model.py',
+      '<(api_gen_dir)/util_cc_helper.py',
+    ],
+  },
+  'actions': [
+    {
+      # GN version: json_schema_api.gni
+      'action_name': 'genapi_bundle_registration',
+      'inputs': [
+        '<@(generator_files)',
+        '<@(schema_files)',
+        '<@(non_compiled_schema_files)',
+      ],
+      'outputs': [
+        '<(SHARED_INTERMEDIATE_DIR)/<(impl_dir_)/generated_api_registration.h',
+        '<(SHARED_INTERMEDIATE_DIR)/<(impl_dir_)/generated_api_registration.cc',
+      ],
+      'action': [
+        'python',
+        '<(api_gen)',
+        '--root=<(DEPTH)',
+        '--destdir=<(SHARED_INTERMEDIATE_DIR)',
+        '--namespace=<(root_namespace)',
+        '--generator=cpp-bundle-registration',
+        '--impl-dir=<(impl_dir_)',
+        '<@(schema_files)',
+        '<@(non_compiled_schema_files)',
+      ],
+      'message': 'Generating C++ API bundle code for function registration',
+      'process_outputs_as_sources': 1,
+      # Avoid running MIDL compiler on IDL input files.
+      'explicit_idl_action': 1,
+    },
+  ],
+  'include_dirs': [
+    '<(SHARED_INTERMEDIATE_DIR)',
+    '<(DEPTH)',
+  ],
+  'direct_dependent_settings': {
+    'include_dirs': [
+      '<(SHARED_INTERMEDIATE_DIR)',
+    ]
+  },
+  # This target exports a hard dependency because it generates header
+  # files.
+  'hard_dependency': 1,
+}